Basic Optics and the Physiology of Vision
- Previous year questions on Basic Optics and the Physiology of Vision for NEET PG (National Eligibility cum Entrance Test - Postgraduate), from the Ophthalmology section of the exam.
- Most questions here come from previous-year papers of Indian postgraduate medical entrance and licensing exams; where a paper and year are recorded the question carries them. The image-based questions are original vignettes written around an openly licensed figure, and were never asked in any exam.
- 54 live questions in Basic Optics and the Physiology of Vision.
- 1 of 54 questions carries a verified exam year: 2019.
- Ophthalmology is worth about 10 of 300 questions on the exam. See every subject’s weightage.
- Question set last updated 5 Sept 2026.
Q1.Refractive index of cornea is
- A1.37✓ Correct answer
- B1.33
- C1.42
- D1.45
Q2.The pa of the Lens which undergoes a change in shape during accommodation is?
- AAnterior central pa✓ Correct answer
- BPosterior central pa
- CAnterior peripheral pa
- DPosterior peripheral pa
Q3.Highest refractory of index is at
- AAnt surface of cornea
- BPost surface of cornea
- CCenter of lens✓ Correct answer
- DPosterior capsule of lens
Q4.Refraction at anterior surface cornea is maximum because
- AAnterior surface of cornea has smaller curvature
- BThere is greater difference between refractive indices of air & cornea✓ Correct answer
- CIt is avascular transparent tissue
- DAll of the above
Q5.Advantage of contact lens over normal glasses;
- APrismatic effect will less✓ Correct answer
- BPrevention from UV rays
- CDecrease inflammation
- DDecrease infection
Q6.Maximum contribution to the refractive power of the eye is by which pa of the eye?
- AAnterior surface of cornea✓ Correct answer
- BPosterior surface of cornea
- CAnterior surface of lens
- DPosterior surface of lens
Q7.A phenomenon by which a substance appears different under varying conditions of colour is called as?
- AMesomerism
- BMetamerism✓ Correct answer
- CFluorescence
- DRefractive index
Q8.Maximum refraction is done by:
- AAnterior surface of lens
- BPosterior surface of lens
- CAnterior surface of cornea✓ Correct answer
- DPosterior surface of cornea
Q9.Visual acuity is a measure of:
- ALight sense
- BForm sense✓ Correct answer
- CContrast sense
- DAll of the above
Q10.Refraction of eye is affected by all except:
- ARemoval of vitreous
- BLens thickened
- COptic atrophy✓ Correct answer
- DAxial length changed
Answer key
Q1: A. 1.37; Q2: A. Anterior central pa; Q3: C. Center of lens; Q4: B. There is greater difference between refractive indices of air & cornea; Q5: A. Prismatic effect will less; Q6: A. Anterior surface of cornea; Q7: B. Metamerism; Q8: C. Anterior surface of cornea; Q9: B. Form sense; Q10: C. Optic atrophy.
Other topics in Ophthalmology
- Ocular Anatomy and Development
- Spherical Errors: Myopia and Hypermetropia
- Astigmatism and Accommodation Disorders
- Conjunctiva
- Sclera
- Corneal Fundamentals and Infectious Keratitis
- Non-infectious Corneal Disease
- Retinal Vascular Disease and Retinal Detachment
- Macular Disease, Retinal Dystrophies and Vitreous Disorders
- Lens: Cataract Types and Clinical Features
- Lens: Cataract Surgery, Complications and IOLs
- Glaucoma
- Uveitis: Anterior and Intermediate
- Uveitis: Posterior and Panuveitis
- Eyelid Disorders
- Lacrimal Apparatus and Ocular Glands
- Orbital Anatomy and Ocular Trauma
- Orbital Disease
- Strabismus: Symptomatology and Evaluation
- Strabismus: Types and Management
- Visual Pathway Lesions and Pupillary Reflexes
- Optic Nerve Disease and Gaze Palsies
- Ocular Tumours
- Clinical Methods in Ophthalmology
- Ocular Manifestations of Systemic Disease
- Community Eye Health and Blindness Control
- Ophthalmic Instruments and Their Uses